Folder mounting for sewing machines



Dec. 18, 1934.

F'. A4 Kum-:RA

Filed Juy '7, 1930 Patented Dec. 18,Y 1934 The PATENT OFFICE FOLDERMOUNTING FOR SEWING MACHINES Frank A. Kucera, Chicago, Ill., assigner toUnion Special Machine Company, Chicago, Ill., a corporation of IllinoisApplication July 7, 1930, Serial No. 466,287

4 Claims.

invention relates to new and useful improvements in folders for sewingmachines, and more particularly to the mounting for a folder.

An folder throat object Vof the invention is to provide a mounting whichmay be attached to the plate of rthe sewing machine so that it may beshifted toward and from the stitching mechanism in the line of feed andyieldingly held in various set positions.

A further object of the invention is to provide a folder mounting of theabove type with an adjustable stop for limiting the movement of thefolder toward the needles so that said folder may be withdrawn andreturned to a predetermined set position.

A still further object of the invention is to provide a folder mountingof the above type wherein the folder is secured to the mounting so thatit may be shifted laterally of the line of feed and secured in adjustedpositions.

In the drawing which shows one embodiment of the invention:

Figure 1 is a side View of a portion of a sewing machine having theimproved folder mounting carrying a folder applied thereto.

Fig.

2 is a Vsectional view through the work supporting arm in front of thefolder and showing the throat plate in end view with the folder.mounting attached thereto.

Fig. Fig. 2.

Fig.

3 is a plan View of the parts shown in 4 is a side view of the foldermounting showing the folder attached and in section and the attach-ingmeans therefor.

Fig.

5 is a longitudinal section through the mounting plate, showing theyielding finger `for frictionally holding the mounting plate in setposition.

The

invention Vis directedbroadly to a mount,-

ing for a folder 'preferably of the type which is adapted for felling.The folder includes a base portion carrying an under scroll member whichguides er edge portion of the fabric.

base p and folds upwardly and inwardly the low- Mounted on this ortionis a fabric support carrying an upand thus form a fell.

The folder is secured to a mounting therefor so that said folder may beshifted laterally of the line of feed and secured in different setpositions.

folder chine.

The mounting for the is secured to the throat plate of the ma- The edgesof the mounting are turned vunderneath the `extreme `edge portions ofthe :throatplate while the body portion of the folder mounting is curvedto conform to the throat plate.v Centrally of this body portion of thefolder mounting is a yielding finger which normally presses against theupper face of the throat plate. T-he under turned portions of themounting hold the mounting in engagement with the throat pla-te butpermits it to be shifted ,endwise of the throat plate, that is in adirection parallel with the line of feed. The yielding memberfrictionally holds said mounting in different set positions on thethroat plate. A stop -is provided for limiti-ng the movement of themounting toward the needles, and this enables the mounting to be quicklywithdrawn from in front fof the presser foot and again returned to a setposition.

Referring more in detail to the drawing, the

improved folder mounting is shown as attached L Vheld Yon the throatplate by a presser foot .4,

and `is fedoif from the end of the arm by a suitable mechanism disposedwithin the work supporting arm. The stitching mechanismincludesrneedles, one of which is indicated at 5 carriedfbya needle bar6, and suitable cooperating stitch forming devices which are alsolocated in the work supporting arm.

The folder consists -of a base folder vmember 7 carrying an under scrollmember 8. Mounted on this base member 7 is a fabric supporting member 9.Said member is carried by a bracket 10 which is secured to the basemember 7 by means of a screw 11. This fabric supporting member 9 carriesan upper scroll member 12. This under scroll member 8 and the upperscroll member 12 are shaped so as to interfold the edge portions of thefabric sections, thus forming a double lap fell. The needles of thestitch forming mechanism pass through the interfolded edge portions andsecure the same together. The folder is carried by a folder mountingwhich consists of a plate 13 curved to conform to the upper face of thethroat plate 2. One edge of this plate 13 is bent underneath the edge ofthe throat plate 2, as indicated at 14. The other edge of the plate 13is bent underneath the other edge of the throat plate, as indicated at15. Thus it is that the mounting for the folder is secured to the throatplate so that it cannot be lifted therefrom, but at the same time it isfree to slide endwise on the throat plate.

The folder mounting has an upwardly extending bracket portion 16, andthe base portion 7 of the folder rests on the top of, this bracket 16.The base portion of the folder eX- tends Well across the foldermounting, as clearly shown in Figs. 2 and 3 of the drawing. The baseportion has a downwardly bent part ll which extends along the left handend of the bracket 16, as viewed in Fig. 4. This downwardly bent part 17is provided with a slot 18. A clamping bolt 19 passes through this slot,and is threaded into the bracket 16. This clamping bolt secures thefolder to the folder mounting. By loosening the screw 19 the folderproper may be shifted laterally of the line of feed or crosswise on thefolder mounting. It is held in adjusted positions by this clamping screw19.

The folder mounting is cut through at 20 to form a yielding finger 21.This yielding finger is normally shaped so as to lie slightly out of theplane of the body portion of the folder mounting, and therefore it willpress against the throat plate. The finger forms a frictional means foryieldingly holding the mounting in set position. When force is appliedto the folder mounting this frictional grip of the finger on the throatplate may be overcome, and thus the folder is moved to different setpositions on the throat plate or entirely removed therefrom.

Mounted on the bracket 16 is an adjustable stop member 22. Said stopmember is provided with a shank portion extending into a recess runninglengthwise of the bracket 16. A set screw 23 is used for securing thestop finger in its desired set position. This stop nger is adapted toengage a shoulder 24 on the throat plate. The folder when moved towardthe needles will be set in a predetermined position relative tothejneedles by-reason of the stop engaging this shoulder. When it isdesired to move the folder back'allY that it is necessary is to pull onthe ymounting so `as to overcome the frictional grip of the yieldingfinger on the throat plate, and the folder'mounting with the folderthereon may be quickly withdrawn from in front of the presser foot.`This enables v'the folder to be moved 'away ,from the presser foot It isobvious that minor changes in the details of construction and thearrangement of the parts may be made Without departing from the spiritof the invention as set forth in the appended claims.

Having thus described the invention, what I claim as new and desire tosecure by.,Letters Patent, is:-

1. The combination of a work supporting member, a folder having meansfor interfolding fabric sections, a support on which said folder ismounted, means for attaching said folder support to said work supportingmember whereby said folder support maybe shifted on the work supportingmember to different set positions, and a yielding nger carried by saidfolder support and bearing against the work supporting member forholding said folder support in any set position.

2. The combination of a Work supporting member, a folder having meansfor interfolding fabric sections, a support on which said folder ismounted, means for attaching said folder support to said work supportingmember whereby said folder support may be shifted on the work supportingmember to different set positions, a yielding friction means carried bysaidfolder support and bearing on said work supporting member forholding said folder support in any set position, and means whereby thefolder may be shifted laterally .on said folder support and secured indifferent set positions.

3. The combination of a Work supporting member,"a folder having meansfor interfolding fabric sections, a support on which said folder ismounted, means for attaching said folder support to said Work supportingmember Whereby said folder support may be shifted on the work supportingmember to different set positions, a yielding friction means carried bysaid folder support and bearing on said work supporting member forholding said folder support in any set position, and an adjustable stopfor determining oneV of the set positions of said folder. Y

4. The combination of a Work supporting member, a folder having meansfor interfolding fabric sections, a support on which said folder ismounted, means for attaching said folder supportr to said Worksupporting member whereby said folder support may be shifted on the worksupporting member to different set positions, a yielding finger carriedby said folder support and bearing against the work supporting memberfor holding said folder support `in any set position, means whereby thefolder may be shifted laterally on said folder support and secured indifferent set positions, and an adjustable stop for determining one of'the set positions of said folder support. i

FRANK A. KUCERA.

